Edwards EV1000

Equations for Calculated Patient Parameters
B-2
CI Cardiac Index
CI = CO/BSA
where:
CI - Cardiac Index, CO - Cardiac Output, L/min
BSA - Body Surface Area, m
2
L/min/m
2
CPI Cardiac Power Index
CPI = MAP x CI x 0.0022
W/m
2
CPO Cardiac Power Output
CPO = CO x MAP x K
where:
Cardiac power output (CPO) (W) was calculated as MAP x cardiac output/451
K is the conversion factor (2.22 x 10
-3
) into watts
MAP in mmHg
CO L/min
W
DO
2
Oxygen Delivery
DO
2
= {(1.38 x HGB x SpO
2
) + (0.31 x PaO
2
)} x CO
______________________________________
10
where:
CO - Cardiac Output, L/min
HGB - Total Hemoglobin, g/dL
PaO
2
- Partial Pressure of Arterial Oxygen, mmHg
SpO
2
- Pulse Oximetry Saturation %
mL O
2
/min
DO
2
I Oxygen Delivery Index
DO
2
I = {(1.38 x HGB x SpO
2
) + (0.31 x PaO
2
)} x CO
______________________________________
10 x BSA
where:
BSA - Body Surface Area, m
2
CO - Cardiac Output, L/min
HGB - Total Hemoglobin, g/dL
PaO
2
- Partial Pressure of Arterial Oxygen, mmHg
SpO
2
- Pulse Oximetry Saturation
mL O
2
/min/m
2
SV Stroke Volume
SV = (CO/PR) x 1000
where:
CO - Cardiac Output, L/min
PR - Pulse rate, beats/min
mL/beat
SVI Stroke Volume Index
SVI = (CI/PR) x 1000
where:
CI - Cardiac Index, L/min/m
2
PR - Pulse rate, beats/min
mL/beat/m
2
SVR Systemic Vascular Resistance
SVR = {(MAP - CVP) x 80} /CO (dyne-s/cm
5
)
where:
MAP - Mean Arterial Pressure, mmHg
CVP - Central Venous Pressure, mmHg
CO - Cardiac Output, L/min
dyne-s/cm
5
Table B-1 Cardiac Profile Equations (Continued)
Parameter Description and Formula Units